Calcium-ammonium nitrate

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   Calcium-ammonium nitrate   
Names: calcium-ammonium nitrate

Formula: 5Ca(NO3)2 · NH4NO3 (anhydrous)
5Ca(NO3)2 · NH4NO3 · 10H2O (decahydrate)
SMILES: [NH4+].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[Ca+2]
Molar mass: 900.473 g/mol (anhydrous)
1080.622 g/mol (decahydrate)

Color: colorless
Decomposition point: 70 °C343.15 K <br />158 °F <br />617.67 °R <br /> (decahydrate)
Magnetic properties: diamagnetic
Stability: highly hygroscopic (decahydrate)
Hardness: fragile
Toxicity: non-toxic


Inorganic compound, double salt of alkaline earth metal calcium, ammonium ion and inorganic nitric acid. From water solutions crystallizes as decahydrate.

Where to buy

Can be bought in fertilizers store (as "Calsol").


Reaction between calcium nitrate and ammonium nitrate

Chemical equation:

NH4NO3 + 5Ca(NO3)2 = 5Ca(NO3)2 · NH4NO3

For preparation of 100.00g of calcium-ammonium nitrate decahydrate а 109.26g of calcium nitrate tetrahydrate and 7.41g of ammonium nitrate is required.

Dissolve compounds in hot water apart and then mix solutions into one container with intense stirring. Cooling or evaporation of a solution will cause double salt crystallyzation.


Grows only in very dry air or in desiccator because solution is too hygroscopic to evaporate.

Storage conditions

For crystal storing use hermetic vessel with small amount of saturated solution at the bottom or place wadding moistened with such solution. You can use such alternatives as vessel with vaseline or vegetable oil, organic non-hygroscopic solvent (kerosene, benzine or paraffin). Also you can use acrylate polymer or another kinds of solidifying plastic.


Temperatureгр/100,00 гр water
25°C298.15 K <br />77 °F <br />536.67 °R <br />120250